In my case (Moto G3, Android 6.0, Airdroid 4.0.0.4) I never got the External SD dialog, but still now an External HD that is visible on phone and web browser. From the web browser I can edit filenames in the phone directory, so have write permission, but the Cut/Paste options are greyed out, and more importantly the Download button is too, so I can't download files to my desktop.

It seems that Airdroid 1) does not realise the directory is r/w, 2) has disabled Download, which is not dependent on permissions anyway

On my Galaxy S5, I just installed a new SDcard. I can manipulate them easily in AirDroid on the phone, but my goal is to do it either with AirDroid on my computer or http://web.airdroid.com/ . I didn't see anything that said anything like "Select SDCard" at the bottom of Tools/Files/SDCard . In one attempt, I got the prompt about "To edit files on External SDCard..." which i was excited to finally get. I followed the steps from there and...nothing. If it connected, it didn't help on my computer with either Airdroid or the web Airdroid. Now I can't get that prompt again. I see an instruction on this site that says you can get that again by trying to copy or delete a file on the phone in AirDroid, but all that happens is that I copy or delete the file. No prompt to connect the card. It could be because it already connects it just fine for the phone so these steps are about that. But what can i do to get the computer to connect to the external card? It handle viewing it just fine...just not things like Upload or Add Folder.

There should be another option added as in customize path where someone can select the path as the one detected by AirDroid does not have write permissions for all folders while the one mounted in /mnt/media_rw/* where the * is the actual name would have full write permissions so allow one that browses from the / to select the folder. Also, there should be a way to change where the External SD Card is later in Air Droid.

you can easily manage files saved to your mobile devices either by saving them to your computer system or you can also use google drive which gives you 15 GB of storage for saving files and other things on the cloud . You can easily access these from anywhere